michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 22:37:49 +00:00
Code Issues Projects Releases Wiki Activity

Update blog to 25122bc05c

Browse Source
This commit is contained in:
travis-update-bot
2015-11-16 14:18:36 +00:00
parent eab586b73b
commit ec6b02ab95
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
_posts/2015-11-15-allocating-frames.md
View File

@@ -306,7 +306,9 @@ fn choose_next_area(&mut self) {
} }
} }
``` ```
This function chooses the area with the minimal base address that still has free frames, i.e. `next_free_frame` is smaller than its last frame. Note that we need to clone the iterator because the order of areas in the memory map isn't specified. If there are no areas with free frames left, `min_by` automatically returns the desired `None`. This function chooses the area with the minimal base address that still has free frames, i.e. `next_free_frame` is smaller than its last frame. Note that we need to clone the iterator because the [min_by] function consumes it. If there are no areas with free frames left, `min_by` automatically returns the desired `None`.
[min_by]: https://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.min_by
If the `next_free_frame` is below the new `current_area`, it needs to be updated to the area's start frame. Else, the `allocate_frame` call could return an unavailable frame. If the `next_free_frame` is below the new `current_area`, it needs to be updated to the area's start frame. Else, the `allocate_frame` call could return an unavailable frame.